Who owns MAC prefix B4DF43E?

B4DF43E is registered to Shanghai Wellsun New Energy Co.,Ltd. in the IEEE MA-M registry.

What devices use B4DF43E?

Any network device with a MAC address starting B4:DF:43:E was manufactured by or for Shanghai Wellsun New Energy Co.,Ltd..

MA-M · OUI prefix

Shanghai Wellsun New Energy Co.,Ltd.

Any MAC address starting B4:DF:43:E is registered to Shanghai Wellsun New Energy Co.,Ltd. in CN.

OUI prefix	B4DF43E
Vendor	Shanghai Wellsun New Energy Co.,Ltd.
Registry	MA-M (28-bit, medium block)
Country	CN
Example MAC	B4:DF:43:E:00:00:00

What this means

The IEEE assigned the MA-M block B4DF43E to Shanghai Wellsun New Energy Co.,Ltd.. Every network interface they manufacture under this block has a MAC address beginning with these digits, followed by a unique per-device identifier. If a device on your network shows a MAC starting B4:DF:43:E, it is Shanghai Wellsun New Energy Co.,Ltd. hardware.

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